Genuine OEM Volkswagen Flexible Coolant Hose, part number 5QM121156B. This hose is a vital part of the engine cooling system, responsible for carrying coolant. It is located within the engine cooling system assembly. Made from high-quality, flexible materials engineered for durability and resistance to heat and pressure. Genuine OEM hoses are manufactured to exact tolerances, ensuring proper fitment and preventing premature failure in the demanding environment of the engine bay.